/usr/include/ruby-1.9.1/ruby/re.h is in ruby1.9.1-dev 1.9.3.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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re.h -
$Author: nobu $
created at: Thu Sep 30 14:18:32 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
**********************************************************************/
#ifndef RUBY_RE_H
#define RUBY_RE_H 1
#if defined(__cplusplus)
extern "C" {
#if 0
} /* satisfy cc-mode */
#endif
#endif
#include <sys/types.h>
#include <stdio.h>
#include "ruby/regex.h"
#if defined __GNUC__ && __GNUC__ >= 4
#pragma GCC visibility push(default)
#endif
typedef struct re_pattern_buffer Regexp;
struct rmatch_offset {
long beg;
long end;
};
struct rmatch {
struct re_registers regs;
int char_offset_updated;
int char_offset_num_allocated;
struct rmatch_offset *char_offset;
};
struct RMatch {
struct RBasic basic;
VALUE str;
struct rmatch *rmatch;
VALUE regexp; /* RRegexp */
};
#define RMATCH(obj) (R_CAST(RMatch)(obj))
#define RMATCH_REGS(obj) (&(R_CAST(RMatch)(obj))->rmatch->regs)
VALUE rb_reg_regcomp(VALUE);
long rb_reg_search(VALUE, VALUE, long, int);
VALUE rb_reg_regsub(VALUE, VALUE, struct re_registers *, VALUE);
long rb_reg_adjust_startpos(VALUE, VALUE, long, int);
void rb_match_busy(VALUE);
VALUE rb_reg_quote(VALUE);
regex_t *rb_reg_prepare_re(VALUE re, VALUE str);
#if defined __GNUC__ && __GNUC__ >= 4
#pragma GCC visibility pop
#endif
#if defined(__cplusplus)
#if 0
{ /* satisfy cc-mode */
#endif
} /* extern "C" { */
#endif
#endif /* RUBY_RE_H */
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